XL2000: How to Determine If a Variable Is an Array

In Microsoft Excel, you can use the IsArray function to test a variable that has been set in a Microsoft Visual Basic for Applications procedure to determine whether it is an array.

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For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS The IsArray function enables you to test a variable to determine whether it is indeed an array. It takes one argument and returns either True, if it is an array, or False if it is not an array. The IsArray function is useful when you call a function that is supposed to return an array; you can use IsArray function in a manner similar to the following sample code to verify that the value returned is an array.

1. Start Microsoft Excel.
2. Press ALT+F11 to start the Microsoft Visual Basic editor.
3. On the Insert menu, click Module.
4. Type the following code in the module sheet:

   Sub IsArrayExample()
   
       Dim DataArray(2) As Integer        ' Declare an array.
       Dim ArrayBoolean As Boolean        ' Declare a Boolean variable.
       ArrayBoolean = IsArray(DataArray)  ' Check if DataArray is an
                                                ' array.
       If ArrayBoolean = True Then
           MsgBox "DataArray is an Array."
       End If
   
   End Sub
   						

5. Press ALT+F11 to return to Excel.
6. On the Tools menu, point to Macro, and then click Macros.
7. Click IsArrayExample and then click Run.
   
   The following message appears:
   DataArray is an Array
8. Click OK to close the message box.

For more information about the IsArray function, in the Visual Basic Editor, click Microsoft Visual Basic Help on the Help menu, type IsArray Function in the Office Assistant or the Answer Wizard, and then click Search to view the topic.